chore(prompt-registry): Use mini zod

[davidkna-sap]

Context

Closes SAP/ai-sdk-js-backlog#ISSUENUMBER.
This should reduce bundled-application size for consumers and increase startup speed:

• https://orval.dev/docs/guides/zod/#zod-mini
• https://zod.dev/packages/mini

What this PR does and why it is needed

[hyperspace-pr-bot]

Summary

The following content is AI-generated and provides a summary of the pull request:

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Chore: Migrate Prompt Registry to Zod Mini

What this PR does and why it is needed

This PR updates the Prompt Registry package to use Zod Mini (zod/mini) instead of the standard Zod library for generated validation schemas.

The change is made in the orval.config.js configuration by setting the zod output variant to mini with version 4:

zod: {
  variant: 'mini',
  version: 4
}

The corresponding generated file prompt-registry.zod.ts has been regenerated to use the Zod Mini API.

Benefits:

• 🌳 Better tree-shaking support, reducing bundled application size for consumers
• ⚡ Faster startup speed due to a smaller runtime footprint

References:

• Orval Zod Mini guide
• Zod Mini package

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• ✏️ Insert as PR Description (deletes this comment)
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PR Bot Information

Version: 1.31.9

• Output Template: Repository PR Template
• Correlation ID: 1c727980-a6e2-11f1-8e09-e48c334fa6d4
• File Content Strategy: Full file content
• LLM: anthropic--claude-4.6-sonnet
• Event Trigger: pull_request.opened
• Summary Prompt: Default Prompt

[davidkna-sap]

The main draw would be that error messages are worse (by default, unless the English langpack its loaded).